/*
 * Copyright 2012 Gregor Schauer
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package at.schauer.gregor.vienna.validator;

import javax.validation.ValidationException;
import java.util.regex.Pattern;

/**
 * @author Gregor Schauer
 */
public class PatternValidator implements Validator<String> {
	protected Pattern pattern;
	protected Validator.Type type;

	public PatternValidator(Pattern pattern, Type type) {
		this.pattern = pattern;
		this.type = type;
	}

	@Override
	public String validateObject(String obj) {
		if (type.isBefore() && (obj == null || !pattern.matcher(obj).matches())) {
			throw new ValidationException(obj);
		}
		return obj;
	}

	@Override
	public String validateString(String obj) {
		if (type.isAfter() && (obj == null || !pattern.matcher(obj).matches())) {
			throw new ValidationException(obj);
		}
		return obj;
	}
}
